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1.
随机子空间方法在桥塔模态参数识别中的应用   总被引：3，自引：0，他引：3  
基于环境振动的结构模态参数识别方法正逐渐成为国内外研究的一大热点。环境振动方法就是仅仅利用结构测试的输出信号进行结构的模态参数识别,随机子空间方法就是其中的一种。随机子空间法是近年来发展起来的一种线性系统辩识方法,可以有效地从环境激励的结构响应中获取模态参数。它属于时域的方法,该方法不需要进行FFT变换,它不仅可以识别结构的频率,而且可以识别结构的阻尼和振型。文章首先介绍了随机子空间的理论,然后用该方法对正在施工中的南京长江三桥的南塔进行模态参数识别,通过与其他方法的识别结果进行比较,证明随机子空间方法不失为一种有效的模态参数识别方法。  相似文献   

2.
Stochastic Environmental Research and Risk Assessment - Conventional landslide analyses, based on deterministic methods or simple random variable methods, cannot consider the spatial variability...  相似文献   

3.
Stochastic Environmental Research and Risk Assessment - A Bayesian importance sampling method is developed to efficiently and accurately calibrate the parameters of non-linear and non-Gaussian...  相似文献   

4.
Stochastic Environmental Research and Risk Assessment - The Brazilian Interconnected Power System is hydro dominated and characterized by large reservoirs presenting multi-year regulation...  相似文献   

5.
Stochastic Environmental Research and Risk Assessment - The phytoplankton community structure is affected by both ecological and spatial factors. Influences of these two factors on phytoplankton...  相似文献   

6.
Stochastic Environmental Research and Risk Assessment - Reliable estimation of return period values of extreme precipitation at ungauged locations is considered to be a key exercise in...  相似文献   

7.
Stochastic Environmental Research and Risk Assessment - Data preprocessing is an indispensable step for landslide displacement forecasting, which is an effective approach for predicting the...  相似文献   

8.
Stochastic Environmental Research and Risk Assessment - Rapidly detecting the beginning of influenza outbreaks helps health authorities to reduce their impact. Accounting for the spatial...  相似文献   

9.
Stochastic Environmental Research and Risk Assessment - The uncertainties associated with the simulation models are often ignored in operational hydrology. While many methods are available for...  相似文献   

10.
Stochastic Environmental Research and Risk Assessment - Conditional autoregressive distributions are commonly used to model spatial dependence between nearby geographic units in disease mapping...  相似文献   

11.
Stochastic Environmental Research and Risk Assessment - This work presents a study of spatiotemporal changes of scour-holes around sand embedded submerged circular and non-circular cylinders with...  相似文献   

12.
Stochastic Environmental Research and Risk Assessment - Spatially distributed processes can be modeled as random fields. The complex spatial dependence is then incorporated in the joint probability...  相似文献   

13.
Stochastic Environmental Research and Risk Assessment - Modeling and forecasting the flow of rivers, especially in flood-prone areas using warning systems, enables officials to take the required...  相似文献   

14.
Stochastic Environmental Research and Risk Assessment - The deposition and release of heavy metals in sediments often lead to their diffusion in lakes, especially for dispersed elements such as...  相似文献   

15.
Stochastic Environmental Research and Risk Assessment - Diagnostics of goodness-of-fit in the theory of point processes are often considered through the transformation of data into residuals as a...  相似文献   

16.
Stochastic Environmental Research and Risk Assessment - In recent years, multiple-point geostatistical (MPS) approaches have gained significant popularity for modeling subsurface heterogeneity in...  相似文献   

17.
Stochastic Environmental Research and Risk Assessment - Previous studies attempting to quantify the contributions of climate change and human activities to runoff variations in a changing...  相似文献   

18.
Stochastic Environmental Research and Risk Assessment - An adequate characterization of the temporal features of background seismicity, namely after removal of temporally and spatially clustered...  相似文献   

19.
Stochastic Environmental Research and Risk Assessment - Water resources allocation is facing great challenge, since hydrological series have shown non-stationarity with high uncertainty due to...  相似文献   

20.
Stochastic Environmental Research and Risk Assessment - To evaluate the consequences on human health of radionuclide releases in the environment, numerical simulators are used to model the...  相似文献   

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